59103domain: NAppears in sequencesLeast term in period of continued fraction for sqrt(n) is 9.at n=35A031433Numbers having four 0's in base 9.at n=21A043456Least number beginning with prime(n) such that every concatenation is a prime.at n=16A090508a(n) = 81*n^2 + 2*n.at n=26A177099